Title:
SURFACE ACOUSTIC WAVE DEVICE WITH UNIDIRECTIONAL TRANSDUCER
Document Type and Number:
WIPO Patent Application WO/2019/141205
Kind Code:
A1
Abstract:
A surface acoustic wave (SAW) device (200), the SAW device (200) includes a piezoelectric layer (304) and a transducer (204,206) having a plurality of electrodes (214). The electrodes (214) are aligned with respective longitudinal axes parallel to each other and perpendicular to a wave propagation direction (220). Each electrode (214) includes a conductive first layer (216) having a first thickness and a first width in the wave propagation direction; and a conductive second layer (218) having a second thickness that is negligible compared to the first thickness. The first layer (216) and second layer (218) are in electrical contact with each other to provide electrical conduction over a total width of the electrode (214) in the wave propagation direction (220), the total width being greater than the first width of the first layer (216).
Inventors:
CHEN ZHUOHUI (CA)
Application Number:
PCT/CN2019/072094
Publication Date:
July 25, 2019
Filing Date:
January 17, 2019
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H03H9/64; H03H9/25
Foreign References:
| US20040201306A1 | 2004-10-14 | |||
| CN1329759A | 2002-01-02 | |||
| US6469598B2 | 2002-10-22 | |||
| US6759788B2 | 2004-07-06 | |||
| CN1543062A | 2004-11-03 | |||
| CN206272582U | 2017-06-20 | |||
| CN106384782A | 2017-02-08 |
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